Fail to see the utility of this too.
The value of trains on tracks is the rolling resistance is significantly lower than rubber tires on road. Hence moving loads over distance is much more energy efficient on tracks than road.
This seems nothing more than a long articulated bus in another skin? Except now, they are melding self driving tech into it. It's still an articulated bus. Same pro/cons as any autonomous electric road vehicle, not that of a tracked train.
Also, beware if it is too long - it's gonna mess up road traffic that it's sharing space with.